B - Operations – Transporting – 25 – D
Patent
B - Operations, Transporting
25
D
B25D 17/10 (2006.01) B25B 21/02 (2006.01) B25B 23/145 (2006.01) B25D 17/00 (2006.01) B25F 5/00 (2006.01)
Patent
CA 2146577
An impulse tool (20) having a housing (22), a motor (26), drive means (30), impulse means (28), trigger means (67), and sensor (32) for automatic shut-off is disclosed. The sensor (32) uses a spring-biased ball (144) that sits on a ball seat (149) adjacent an entry orifice (108) and a spring-biased piston (112) such that when a predetermined non-transient torque is reached, the strength, duration and frequency of pulses of the working fluid entering the entry orifice (108) will lift the ball (144) sufficiently to impose on the piston (112) and to progressively lift the piston (112) to allow the working fluid to a triggering height which starts the shut-off of the impulse tool (20). A delay means is also disclosed that may include a regulator (172), dashpot (170), spring latch (204), and trigger bar (56) or latch. A method of cooling an impulse tool with cold, dense air throughout is also disclosed.
Cooper Technologies Company
Deeth Williams Wall Llp
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